Permutation-padlock



P. LO CASCIO.

PERMUTATloN PADLocK. APPLTCATION FILED, FEB. 28. 1919.

Patent@ Ang'. 12, 1919.

2 SHEETS-SHEET l.

1,312,790. Fgl.

Figi.

P. L0 CASCIO.

PERMUTATION PADLOCK.

APPLICATION FILED` FEB. 2s, IsIs.

Patented Aug. 12, 1919.

2 SHEETS-SHEET 2.

PASQUALE LO CASCIO, OF BROOKLYN, NEW YORK.

PERMUTATIO'N-PADLOCK.

Specification of Letters Patent.

Patented Aug. 12, 1919.

Application led February 28, 1912. Serial No. 279,749.

To all whom it may concern.'

Be it known that I, -PASQUALE Lo CAsoro, a subject of the King of Italy, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Permutation- Padlocks, of which the following is a'full, clear, and exact specification.

This inventionrelates to permutation padlocks, and has for its object to provide a lock of this kind which is simple in construction, reliable in operation and which isl composed of few parts not likely to become displaced or out of order. Another object is to provide improved means for changing the combination. Other objects will appear as the description proceeds.

The invention will be first hereinafter described in connection with the accompanying drawings, which constitutevpart of this specification, and then more specifically dened in the claims at the end of the description.

In the accompanying drawings, wherein similar reference ,characters are used to designate corresponding parts throughout the several views Figure 1 is an elevation of a padlock embodying the invention drawn to a somewhat enlarged scale.

Fig. 2 is a vertical section through the lock in line with the shackle, the latter beinw shown in locked position.

ig.v 3 is a -similar view showing (the shackle'in unlocked and withdrawn position.

Fig. 4 is a vertical' section through the lock in line with the bolts whichholdthe base plate to the core, this section being taken at right-angles to those of Figs. 2 and 3.

Fig. 5 is a cross section on the line V-V of Fig. 2.

Fig. 6 is a detailed perspective view of the shackle. I

Fig. 7 is a detailed perspective view of the top plate ofthe lock.

Fig. 8 is a 'similar view of one of the turnbler rings or collars.

Fig. 9 is a similar view of the core of the lock. y

Fig. 10 is a similar view of the combination changing Collar which engages the base plate. y

Fig. 11 is a similar view of the base plate with the bolts which are used to secure the core thereto shown in engagement therewith, and Y Fig. 12 is a detailed plan view of one of the screw lugs which hold the spring to the core.

The lock comprises essentially a core 1, a base plate 2, a. combination changing collar 3 seated on said plate and clamped between the same and the base of the core, a pluralityv of tumbler rings @ffii-,ted to rotate around the core,and` a top plate 5 .which is secured to the upper end of the core by a screw 36 and serves to retain the tumbler rings in position. The base plate 2 is fastened to the core 1 by a pair of bolts 6 which extend up from the base plate into bores 7 in the core and are secured'by tubular nuts 8 seated in enlarged recesses 9 at the upper ends of said bores. Said base plate is rabbeted at 11 to fit in a rabbet bore 10 of the collar 3, Said collar extending between the base plate and the lowerend of the core so that when the nuts 8 are tightened on the bolts 6 said collar will be clamped to the base plate and become to all intents and purposes a part thereof. Said collar contains a graduated scale on its outer surface, as illustrated in Figs. 1 and 10, to coperate with graduated scales as shown on the tumbler rings. The collar may be adjusted to change the combination when the nuts' 8 are loosened on the bolts 6, and when said nuts are tightened the collar is clamped at 12 between the core and base plate, as already stated, so as to hold the collar inv the adjusted position. The top plate 5 covers the nuts and prevents unauthorized changing of the combination.

In the core y1 there is formed a longitudinal groove or recess 13 in which is tted to slide the shank 14 of the shackle 16, the latter being pivoted at 15 to said shank. The shackle passes throughnn opening 17 in the top plate 5, and when unlocked and drawn out, as illustrated in Fig. 3, said shackle maybe swung on the pivot or hinge 15 to facilitate the removal of the locked parts (not shown) from within the hook of the shackle. When locked, a reduced stud 18 on the free end of the shackle engages a socket 19 in the top plate, as shown in Fig. 2. A strip 20 may be placed over the groove or recess 13, as shown best in Fig. 5, to sep arate the shank of the shackle from the tumbler rings, said strip being seated in steps 21 at the outer edges of the-side walls of the recess. A notch 22 is formed in the inner face of the shank 14, and the lower edge of said recess is beveled at 23 for a purpose to be hereinafter explained. The lower inner corner of the shank is also beveled at At the upper end ofthe shank there is an abutment 25 which is adapted to engage the under surface of the top plate 5 at the inner margin of the opening 17 for preventing said shank and the shackle from being detached from the body portion of the lock, see Fig. 3.

Diame'trically opposite the groove or recess 13 another longitudinal groove 26 is formed in the core 1, and in said groove 26 is mounted to slide a locking bar 27. This locking bar has an extension or branch 28 which reaches through a transverse passage 29 in the bore to the groove or recess 13 and the end of the extension or bnanch normally engages the notch 22 in the shank 14:, as shown in Fig. 2, so that the shackle cannot be withdrawn. The end 30 of said extension or branch 28 is beveled to -it the beveled Wall 23 of the notch 22 and the beveled lower end 24 of the shank 111.

Behind the locking bar 27 screw lugs or studs 31 are secured to the core b-y means of their threaded shanks 34, and said studs 31 have transverse 'bores 32 into which the end portions of a spring 33 extend. The middle portion of said spring is passed through the extension of branch 28 yof the locking bar and normally holds said bar in the position shown in Figs. 2 and 5 where its outer face is flush with the outer surface of the core.

Each of the tumbler rings 4 has a groove 35 in its inner face adapted to be brought into line with the locking bar 27, and when all of said tumbler rings are brought so into line with the bar, as can only be done by rotating said rings to comply with a predetermined combination of numbers on the graduated scales on the outsides of the rings and on the out-side of the collar 3, the bar may be forced out or displaced into said grooves 35 in the rings 4 by pulling out the shackle, the beveled wall 23 of the notch 22 in the shank of the shackle riding on the beveled end 30 of the extension or branch 28 of said bar to accomplish this outward movement of the bar. lVhile the shackle is withdrawn or in unlocked posit-ion, the locking bar 27 is retained in its engagement with the grooves 35 in the tumbler rings, as shown in Fig. 3, lby the extension or branch 28 engaging the lower end portion of the shank 14, so that the tumbler rings cannot lbe rotated. lVhen, however, the shackle is moved to closed or locked position, Fig. 2, the spring 33 returns the. locking bar 27 to norma-l position leaving the tumbler rings free to be rotated to scatter the combination.

It will be observed that when the shackle is locked in closed position the top plate 5 cannot be removed even should the screw 36 be taken out, but that when the shackle is unlocked and the top plate released, the shackle with its sha-nk may be taken entirely out. When the shackle and shank are to be inserted, as when assembling the lock, said shank is pushed down into the recess or groove 13 and the beveled end 24 of said shank will by riding along the beveled end 30 of the extension or branch 28 push the locking bar outward and allow the shank to be fully inserted, but this can only be done when the tumbler rings are so arranged according to the predetermined combination as to bring all of the grooves 35 in said rings in line with said locking bar.

The combination may be changed by interchanging the several tumbler rings as well as by adjusting the collar 3 as previously described.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. In a permutation padlock, the combination with a core member, of a plurality of ring tumblers surrounding said core member and each having a groove in its inner surface, a locking bar mounted to slide in the core member, a shackle having its shank normally locked by said slide but adapted to displace the bar into the grooves in the tumblers when they are arranged in line with the bar, and means for retracting said bar into the core for releasing the tumblers when the shackle is moved to locked position.

2. In a permutation padlock, the combination with a core member, having longitudinal grooves in diametrically opposite portions of its surface, of a plurality of ring tumblers surrounding said core member and each having a groove in its inner surface adapted to be brought into register with one of said grooves in thei core member, a locking bar mounted to slide in said groove in the core and having an extension reaching through the core to the other groove therein, and a shackle having a shank engaging said latter groove in the core and normally locked in closed position by said extension of the bar but adapted to displace the bar into the grooves in the tumblers when the latter are arranged with their grooves in line with said bar.

3. In a permutation padlock, the combination with a core member having longitudinal grooves in diametrically opposite portions of its surface, of a plurality of ring tumblers surrounding said core member and each having a groove in its inner surface adapted to be brought into register with one of said grooves in the core member, a locking bar mounted to slide in said groove in the core and having an extension reaching through the core to the other groove therein, a shackle having a Ishank engagin said latter groove in the core and norma ly locked in closed position by said extension of the bar but adapted to displace the bar into the grooves in the tumblers when they are arranged in line with said bar, and a spring connected to the core and bar and housed in the groove behind said bar for retracting the bar and releasing the tumblers when the shackle is moved to locked position.

4. In a permutation padlock, the combination with a core, of a plurality of ring tumblers surrounding said core and each having a groove in its inner surface, a locking bar mounted to slide in the core, a shackle normally locked by said bar but adapted to displace the same into the grooves in the tumblers when they are brought into line with said bar, and a spring connected to the core and bar for retracting the latter when the shackle is moved to closed position.

In a permutation padlock, the combination with a core, of a plurality of ring tumblers surrounding said core and each having a groove in its inner surface, a locking bar mounted to slide in the core and having an extension, a shackle normally locked by said extension of the bar but adapted to displace said bar into the grooves in the tumblers when they are brought into line with said bar, a spring passed through the extension of the bar, and studs secured to the core and having perforated heads through which said spring is passed for retracting the bar from the grooves in the tumblers when the shackle is moved to locked position.

6. .In a permutation padlock, the combina- A tion with a core, of a plurality of ring tumblers surrounding said core, locking means coperating with said tumblers, a shackle controlled by said locking means, a base plate at the bottom of the core, a combination changing collar interposed between said base plate and core and having its periphery arranged on the outside of the lock substantially flush with the tumblers, and means for clamping said collar between said base plate and core.

7 In a permutation padlock, the combination with a core, of a plurality of ring tumblers surrounding said core, locking means coperating with said tumblers, a shackle controlled by said locking means, a base plate at the bottom of the core, a combination changing collar interposed between said base plate and core, bolts extending from the base plate through the core, nuts on said bolts and housed in the core for tightening the bolts for clamping the collar in adjusted position between the base plate and core, and a top plate to cover said nuts.

8. In a permutation padlock, the combination with a core, of a plurality of rin tumblers surrounding said core, a shac :le to slide between the core and tumblers, means controlled by said tumblers for normally locking the shackle in closed position., an abutment on the shackle to limit the outward movement of the same, and a top plate on the core to be engaged by said abutment for the purpose specified.

Inl testimony whereof I have signed my name to this specication.

PASQUALE LO CASCIO.

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

